Overhead traveling crane



3 SheetsfSheen z.

(No Model.)

H. MURGAN. GVBRHEAD TRAVELING' CEANE.

Patented May 26, 1896.

3 Sheets- Sheet 3. A

-k'mo Mariel.;

WgH. MORGAN OVERHEAD TRAVELN'G CRANE.

'1m www.

Pate-m MaJ-y 26, ms.

.-ticularly to that class einem A FFME..

WILLiAn artnr Mensen, oratie-Anon, onto.

evenaren rare/rune enligne.

` Asrncrrnmirroir forming part of :tenere retenir. ne. scones, (naamw 26,4896..

Application iiled September 7,1895. Serial lli-oi .Td-@ZZ wiwi/1eA t 'muy concern:

Be it known that I, WILLIAM HENRY Mon- GAN, of Alliance, in the county vof Stark and State of Ohio, have invented certain new and useful Improvements in Overhead Traveling Cranes; and I do hereby declare the follow,- ing Vto be a full, clear, and exact description of the invention, such as will enable others skilled in the art .to which it appertains to make and use the same.

My invention relates to an improvement in overhead traveling cranes, and more par` of cranes4 wherein a :traveling trolley or trolleys are mounted on a traveling bridge. Up to the time of the eni-Y ployment of the electric motor on this class of cranes the speed of the bridge and the trolley thereon was, owing to the complicatedchan Vacter of the driving-gear, necessarily slow',

and it was not a difficult matter to promptly stop them at the end of their respective trackways. Since the introduction of the electric motor on cranes of this class a much. wider range of speed of bridge and trolley is attainable, and the danger of the bridge leavin gthe track at the ends of the track or the trolley leaving the bridge is correspondingly increased.

rlhe object of my invention is to provide means for preventing the trolley from leaving the bridge at the ends thereof or the bridge leaving' its trackway at thc terminals; and it Lconsists in the parts and combinations of parts, as will bc more fully described, and pointed out` in the claims. ln the accompanying drawings, Figure lis a view'of a section of an overhead traveling .crane embodying my invention. Fig. is a view in 'end elevation of one forni of yielding buffer. Fig. Sis a View vshowing the butler on the bridge.

A represents a traveling bridge actuated by any suitable motive power.

B is a trolley-wheel mounted pn the bridge and' adapted to move lengthwise thereof, the said trolley bein gpreferably propelled by electric motors, and B is the trackway on which the bridge travels. In` some instances the en ds of trackway C and trackway B, on which trolley B and bridge Arespectively move,

are turned np, forming abutments to limit end travel of Atrolley and bridge. In other 'considerable damage `result and considerable expense incurred in bridge from leaving 561,863. ort man.)

cases stops of varions 'kinds are attached to the tracks, and in others Ano provision is made for limiting end travel.' Owing` tothe fact that the operator who controls the movements of the bridge and trolley "is `located in a cage below the' bridge it frequently happens that the trolle'ygand bridge collide with considerable force against the respective end abutments and arci-regnen tly injured, and if they should overrun or ride over the a'butrnents if not loss of lifeA yvould replacing the bridge or trolley onfthe track.

To prevent the trolley vfrom leaving the track at the ends or from passing predetermined points on said track and to prevent the track B', I employ the frames or bracketsl). Each frame is bifurcated at its lower end, as shown. at a, Fig. 2, to straddle the rail, and is provided at its base t with holes c for the passage of bolts which secure it to the girder carrying therail. This bracket is provided with the buifer G. (Shown. in Figs. l and 3.) Vhileasingle b'uier over a rail on the trackway on thebridge and on the longitudinal runway on which the bridge moves might be suiicient, I prefer' to use a buer over each rail.` Each bracket `is provided with an enlarged head D', preferably integral therewith, and each head is provided with a recess to receive the inner ends of a series of springs E or with a recess foreach lspring and is provided centrally with a bore or sleeve F for the passage of the bolt F', I'can f ried by the buffer G. The buffer G consists, essentially, of a shoe shaped like a brake-shoe and providd at rear-sideavith-a base-plate Gr.l This'baseplate carries a series 'of 'studs g, Whichiatter form seats orsupports lfor the outer en ds of the springs E. These springs, being between f the bracket D andbase-plate G of thc shoe,

operate to hold bracket. center approximately e zontai Lila-1e of thewheel with which it enl gages, andas the shoe lo the periphery of the Wheel it overlaps Vthe the shoe away from the; The shoe rests with its hozizoilltefl;v in line with thc honi?? is shaped 'to conform loc `Wheel above its center and, besides operating as a brake', absolutely prevents-thc wheel Vfrom. rising 'and consequently prevents the trolley from ridingl over thejengls of tliejbridgelf or the bridge :from riding over the ends ol the longitudinal runway.v Then the\ vlieelsirst come in Contact with the shoe, the shoe operates to brake the Wheels. The nionientu 1n, however, would cause the part to slide, and to allow for this vmoven'lent and for t he further purpose of bringing the part to n standstill Iwitho'ntundne shock l interpose the springs. Thus it will be seen that as the wheel `first strikes the shoe the let-ter operates ns an ordinary llrnike, but yieldszinthe direetion ofrv against displaeement und to relieve the bolt li ol' eonsidereble strain, l provideeaeh shoe G with e s nizill track-wheel II,y which latter runs on the rails and prevents dangerous dmvnunrd strains on the parts carrying the shoe. 'lhese lmil'ers are applied to the mils mi the bridge lorengnging the wheels carrying tlieirbllcymd also on the rails of the bingitudiiml runway on which the wheels catrrlvinle the bridge travel, zuid while l prefer toA construct und locate the shoe to engage the wheels ol the several perts it-u'ill be seen that -1 he shoe might engage. thetrolleyimme and bridge-freine, either or both, :tud thus operate to slop the movement und ztlsoprevent Jthe part from riding npgbut I prefer to` have the shoes engage the wheels, as they then` in addition to perforinin g the funeti on of bu fliers, also operate es bra-kes.

Having fully described my invention, what I claim as new, and desire to seeure by Iletters Patent., is-

1; The combination with e track* n1 ovable part mounted on wheels el. to travel thereon, of a frame rigid with the trnekwny end projeetingabove seine and e butter yieldingly supported at the upper end of seid ilrnine, the said buffer having a. con'- eeve or curved bearing-face adapted to engage the trend of n wheel of 'the uloveble part, substantially :is set forth.

2. A buffert'or engaging the wheel of t movable part consisting of 2t bracket seenred :nljecent to e trztekwa'y, a curved shoe carried by the bracket and e spring interposed tween the shoe and bracket.

A buffer for engaging the Wheel ol` u niorztble perteonsisting of ay bracket secured ad jacent to artraekwey, e curved shoe carried by the bracket, springs interposed between the shoe and braek'et and :i roller or wheel carried by the shoe :ind moving in contartwith the rail, substantially as set l'orth.

In testimony whereol.l I have' signed this specification in the presenee of.' two subscribing witnesses. i

' ,VILIAH HENRY )lOlill v and n Witnesses E. WooLoAn, T. D. RUSSELL.

.'lftptedy 

